REMOVAL - TM-10-3930-607-150096

2. When connecting a booster battery, make certain

The only field coil in the alternator is located on the rotor

shaft. This field coil is surrounded by the poles of the

to connect the negative battery terminals together and

the positive battery terminals together.

rotor segments. Since it is a part of the rotor assembly,

the field coil turns with the rotor. (Fig. 8)

3. When connecting a charger to the battery,

connect the charger positive lead to the battery positive

terminal and the charger negative lead to the battery

negative terminal.

4. Never operate the alternator on open circuit.

Make absolutely certain all connections in the circuit are

secure.

5. Do not short across or ground any of the

terminals on the alternator or regulator.

6. Do not attempt to polarize the alternator.

B. REMOVAL

1. Disconnect wires from alternator terminals. Tag

each wire for identification at time of installation.

2. Loosen the mounting bolts and adjusting arm cap

screw to loosen drive belt. Remove belt from pulley.

Figure 8.

3. Remove the adjusting arm cap screw and

The stator windings are attached to the stator frame and

mounting bolts, then lift alternator assembly from

carry output current. They perform the same function as

engine.

the rotating windings in the armature of a D.C.

generator.

4. If a replacement unit is to be installed, remove

pulley and fan for installation on replacement unit.

The brushes are connected in series with the field coil,

and carry only the low field current.

C. DISASSEMBLY (Fig. 9)

IMPORTANT: Since the alternator and regulator are

1. Scribe marks on the end flames and stator to

designed for use on only one polarity system, the

help placing them in their original positions during

following precautions must be observed when working

assembly. Remove the through bolts.

on the charging circuit. Failure to observe these

precautions will result in serious damage to the electrical

2. Separate the drive end frame and rotor from the

equipment.

stator assembly, using a screwdriver to pry apart at the

stator slot.

When installing a battery, always make

absolutely sure the ground polarity of the battery and the

ground polarity of the alternator are the same.

B-59